Spark 安装 - 错误:无法找到或加载主类 org.apache.

问题描述

安装 spark 2.3 并在 .bashrc 中设置以下环境变量(使用 gitbash)

After spark installation 2.3 and setting the following env variables in .bashrc (using gitbash)

1. HADOOP_HOME

1. HADOOP_HOME

SPARK_HOME

PYSPARK_PYTHON

PYSPARK_PYTHON

JDK_HOME

执行 $SPARK_HOME/bin/spark-submit 显示以下错误.

executing $SPARK_HOME/bin/spark-submit is displaying the following error.

错误:无法找到或加载主类 org.apache.spark.launcher.Main

Error: Could not find or load main class org.apache.spark.launcher.Main

我在 stackoverflow 和其他网站上进行了一些研究检查，但无法找出问题所在.

I did some research checking in stackoverflow and other sites, but could not figure out the problem.

执行环境

1. Windows 10 企业版
2. Spark 版本 - 2.3
3. Python 版本 - 3.6.4

你能提供一些指导吗?

推荐答案

我收到了那个错误信息.它可能有几个根本原因，但这是我调查和解决问题的方式(在 linux 上):

I had that error message. It probably may have several root causes but this how I investigated and solved the problem (on linux):

• 不要启动 spark-submit，而是尝试使用 bash -x spark-submit 来查看哪一行失败.
• 多次执行该过程(因为 spark-submit 调用嵌套脚本)，直到找到调用的底层过程:在我的情况下类似于:

• instead of launching spark-submit, try using bash -x spark-submit to see which line fails.
• do that process several times ( since spark-submit calls nested scripts ) until you find the underlying process called : in my case something like :

/usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java -cp '/opt/spark-2.2.0-bin-hadoop2.7/conf/:/opt/spark-2.2.0-bin-hadoop2.7/jars/*' -Xmx1g org.apache.spark.deploy.SparkSubmit --class org.apache.spark.repl.Main --name 'Spark shell' spark-shell